角膜屈光手术是指通过角膜手术矫正近视、远视以及散光等屈光不正的方法，临床上经常可以见到术后屈光回退的现象，即手术后又发生了屈光不正。屈光不正以及手术导致的欠佳的视觉质量经常会给患者带来困扰。截止目前，不同种类以及方式的角膜屈光手术均存在屈光回退的问题。目前认为角膜屈光手术后发生的屈光回退主要和角膜上皮增厚以及角膜生物力学改变相关。屈光回退可以在术前通过患者的手术条件以及手术相关参数等危险因素进行预测和规避，同时也可以通过选择合适的手术方式和药物方法进行预防。对于已经发生的屈光回退可选择非手术方法以及增效手术方法进行处理。

Corneal refractive surgery is a method of correcting refractive errors such as myopia, hyperopia and astigmatism through corneal surgery. Refractive regression can often be seen in clinical practice, that is, refractive errors occur again after surgery. Refractive regression and the consequent poor visual quality often trouble patients. So far, different types and methods of corneal refractive surgery have the problem of refractive regression. It is believed that refractive regression is mainly related with epithelium thickening and change of corneal biomechanics. Refractive regression could be predicted and avoided by preoperative risk factors such as preoperative conditions and operative parameters, and can also be prevented by selecting appropriate refractive surgery and using medicine. Non-operative and enhancement surgery can be used to treat refractive regression that has occurred.